Portable Charger?

Portable Charger?

Is there any tech on the rise in Tesla for portable quick chargers in case of emergency?
Something that can fit in the cubby of the frunk or pit in the back that you can have charged up and use to quick charge your battery for a little extra mileage in case you don't quite make it to the next station?

Or it would be a great idea to have some sort of manual charging system. Like a pedal generator that you can crank in order to charge the battery back up manually. Would be good for roadside outages or have it able to be attached to a home exercise machine and make it part of a healthy routine to power up your car through exercise. Virtually eliminates electric consumption and cuts the fat at the same time :)

PorfirioR | May 18, 2013

A parked model S would probably use more energy at rest than what you can produce in a bicycle. So, good plan for the exercise, but not so good for charging your car.

Roadside assistance companies are adjusting to EV needs. So roadside assistance from Tesla or someone else is your best bet, in my opinion.
Here is one example:

Vawlkus | May 18, 2013

A 110v plug would do better than any manual generator would, and there's quite a few of those around these days ;)

kilimats | May 18, 2013

LOL, sorry i had to laugh out loud, imagine driving down the hwy and you see an ecar stuck on the side and the owner pedaling on a bike like a mad cow to get some extra juice ahahahhahah

Bubba2000 | May 18, 2013

The range anxiety issue is there because the M85 effective range at normal highway speeds with HVAC is about 225 miles at best. It is ok for some out of town trip, but not enough in many cases. Tesla should offer the option to convert the Frunk space for additional battery capacity. They could have 2 options - one that just uses the space behind the net, the other that uses most of Frunk space.

The Frunk has a capacity of 5.3 ft3. That is 9,158 in3. If each 18650 Li-ion cell plus the cooling system takes 2 in3, that volume is good for 4,579 cells. Using 4Ah Panasonic cells, total power stored would be about 18.3 KW-hr. Total KW-hr would be 103 KW-hr. Even for some increased friction due to the weight increase, the range would be 274 miles. Nominal miles would be 350 miles. Just looking at possibilities.

Only Tesla could do this kind of upgrade because it would need power management, cooling system, beef the suspension, etc. I suspect Elon would never do something like this. He is going to opt for superchargers for now and in a couple of years offer a 500 mile battery using the same footprint.

Anyway, most folks have 2 cars... one can be ICE for now. Till the 500 mile battery shows up along with national supercharger network.

olanmills | May 20, 2013

"Is there any tech on the rise in Tesla for portable quick chargers in case of emergency?"

This just basically amounts to having an extra battery. You would get the same effect by software-limiting a portion of the battery as a virtual "reserve battery". And in effect, the Model S does this already. The range indicator can drop below zero and still drive for a little while.

It's much more effective to simply work to improve battery capacity and make batteries cheaper.

"Or it would be a great idea to have some sort of manual charging system. Like a pedal generator that you can crank in order to charge the battery back up manually."

This is not practical. It takes a large amount of energy to move a 3,000 - 4,000 lb. vehicle. I bet you would not be able to generate enough electricity to go even a mile.

Have you ever been to science museum where they have a hand-cranked electrical generator connected to a 100 Watt light bulb? Try it, it's very tiring to keep the light bulb lit for any good length of time. That's just 100 Watts. When you are cruising at 55 mph on a flat road, the Model S uses 5,000 - 15,000 Watts.

mitchell.shon | May 20, 2013

Thanks for the insight :) Me and a couple engineer buddies are actually throwing some stuff together to see if we can't make it viable.

@ kilimats - hahaha yeah, that was the first thing that popped into my mind. Technology can fix the power issue, but still at a loss on how to limit the shame :D

scottch | May 20, 2013

A reasonably fit bicycle racer (not a casual rider) can probably crank at 350 W for an extended time. So after 1 hour, he can produce enough electricity to move the car 1 mile. I think it's more efficient to just tie a rope to the back of a tricycle and try to tow the car :-)

I once saw a Zap car (one of those crappy little three-wheel penalty boxes) on the side of a road in the hills above Palo Alto with a Honda generator buzzing away. I had to laugh. Those generators weigh over a hundred pounds and can generate about maybe 3000 W.

Yong Moon | October 7, 2013

I think if Tesla could innovate on a bike charger that can efficiently charge in addition to charging to the wall, it would appeal to a lot of people that are buying a Tesla to reduce carbon footprints. People like myself use exercise machines at home everyday after work and it seems like wasted energy. Although the idea behind Tesla is to reduce car emissions, the power needed to charge the Tesla, still comes from a power source that still uses coal and other "non-clean" solutions. It is also at times just as costly as fuel. If for example, we were to all use Tesla cars, the rate of charge for electricity would be through the roof. We are then left to use alt fuel sources to provide energy for the "clean" vehicle. Maybe a solar and wind mount in addition to a wall mount would be nice? The point being to use as little outside energy as possible.

Yong Moon | October 7, 2013

I guess solar doesn't make much sense since you're charging at night at least for day to day drivers...

Brian H | October 8, 2013

That's where the grid utilities come in handy. Heard of them?

Earl and Nagin ... | October 9, 2013

@Young Moon,
Regarding your idea to use exercise equipment to charge your Tesla: It will work but not very well. A fit human can exert about 500 watts or 1/2 a kilowatt for about a half hour (varies, of course, with fitness level). That would produce about 1/2 kWhr per hour. If the Model S can travel 3 miles on a kWhr, that would get you about 0.75 miles from your hard workout.
The good news is that the major growth in electricity generating capability today is from clean alternative energy sources, not coal or hydrocarbons. You can also easily purchase your own solar to put on your roof if you wish to help out and potentially even save money.